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博碩士論文 etd-0722109-151433 詳細資訊
Title page for etd-0722109-151433
論文名稱
Title
腔內式822nm銫原子穩頻半導體雷射
Intracavity cesium -stabilized 822nm diode laser
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
64
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2009-07-08
繳交日期
Date of Submission
2009-07-22
關鍵字
Keywords
穩頻雷射、6s-8s雙光子躍遷、銫原子、外腔雷射
ECDL, Cesium, 6s-8s Two photon transition, frequency-stabilized laser
統計
Statistics
本論文已被瀏覽 5687 次,被下載 3208
The thesis/dissertation has been browsed 5687 times, has been downloaded 3208 times.
中文摘要
我們整合了穩頻雷射的兩個系統(外腔雷射和銫原子螢光偵測系統)為單一個可攜式穩頻雷射,利用把銫原子管(Cs cell)放在雷射共振腔內的概念,來設計一個巴掌大的可攜式穩頻雷射光源822nm,以取代過去將銫原子管放在腔外來取得螢光訊號之方法,藉此增加穩頻光源之機動性,並且有效利用腔內的光強度大於腔外的優點,來提高鎖頻誤差訊號的訊噪比,我們使用Allan variance來檢測雷射的穩定性,發現在時間積分90秒有最佳值為2.9954E-12,由拍頻訊號推出雷射線寬為200kHz。這樣的設計有助於鎖住飛秒脈衝光梳子雷射的偏頻和CEP光源之研究。
Abstract
We combined an ECDL and the fluorescence detection system into a portable frequecy-stabilized laser.We installed an atomic cesium cell inside rather than outside the external diode laser cavity in order to minimize the frequency-stablized laser to palm size.In this way, we improved the mobility of the frequecy-stabilized laser. Moreover, the enhanced intensity of laser inside the external cavity increased the signal to noise ratio of the error signal for feedback control. We used Allan variance as an efficient method to quantify noise of the laser and we found the best value was 2.9954E-12 when the time integration was 90 second and the line width of laser was 200 kHz by beat frequency. This design can be exploited to lock the offset frequency of a femtosecond frequency comb laser, thus being helpful in the reaserch of CEP(carrier-envelope phase) light source.
目次 Table of Contents
目錄
第一章 研究動機與歷史背景 1
1.1 建立光頻率標準以為光梳雷射的參考雷射 1
1.1.1光梳雷射的發展歷史與原理 1
1.1.2 光梳雷射直接鎖頻於光頻率標準的優點 3
1.1.3 可攜式光書參考雷射的優點及製作上的困難[2] 4
第二章 基本理論 9
2.1銫原子超精細結構(Hyperfine Structure) 9
2.2 雙光子躍遷[7] 11
2.3 鎖相放大器[19] 14
第三章 實驗架設 16
3.1 雷射腔機構設計 16
3.2 雷射實體圖 25
3.3自製雷射電流供應器 27
3.3.1電流供應器電路設計原理 27
3.3.2 雷射電流供應器測試報告 30
3.4自製溫度控制器 31
3.4.1 溫控線路設計原理 31
3.4.2溫控測試報告 34
3.5實驗配置 37
3.6壓電材料(PZT)的頻率響應 39
第四章 實驗結果 41
4.1螢光訊號與訊噪比 41
4.2 Allan variance and Standard deviation[12] 45
4.3 拍頻訊號 49
第五章 結論與未來展望 50
參考文獻 52
參考文獻 References
參考文獻
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direction output beam,” Rev. Sci. Instrum. 72, 12, 4477-4479 (2001).
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“Accurate measurement of the frequency of the 6s-8s two-photon transitions in cesium,” Opt. Commun. 160, 1, 1-4 (1999).
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[12] F. Trager, “Hanbook of lasers and optics,” Springer (2006).
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[15] W. Y. Cheng, L. Chen, T. H. Yoon, J. L. Hall, and J. Ye, “Sub-Doppler Molecular Iodine Transitions Near the Dissociation Limit (523 to 498 nm),” Opt. Lett. , 27, 8, 571-573 (2002).
[16] R. E. Best, “Phase-locked loop theory, design, and applications,” second edition (1993).
[17] K. Doringshoff, I. Ernsting, R. H. Rinkleff, S. Schiller and A. Wicht, “Low-noise, tunable diode laser for ultra-high-resolution spectroscopy,” Opt. Lett., 32, 19, 2876-2878 (2007)
[18] P. Fendel, S. D. Bergeson, T. Udem, and T. W. Hansch, “Two-photon frequency comb spectroscopy of the 6s-8s transition in cesium,” Opt. Lett. 32, 6, 701-703 (2007)
[19] Stanford Research Systems, “SR830 DSP Lock-in Amplifier,” User’s manual (1999).
[20] C. E. Wieman and L. Hollberg, “Using Diode Lasers for Atomic Physics,” Rev. Sci.Instrum. 62, 1, 1-20 (1991).
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